公开(公告)号：US20210057700A1

公开(公告)日：2021-02-25

申请号：US16672550

申请日：2019-11-04

Applicant: Ningde Amperex Technology Limited

Inventor： Silin Huang ,  Huixin Wang ,  Sheng Cheng ,  Hongming Yu

IPC: H01M2/16 ,  H01M4/62 ,  H01M10/0525

Abstract: The present application provides an electrochemical device. The electrochemical device, comprising: a positive electrode; a negative electrode; and the separator, disposed between the positive electrode and the negative electrode, wherein the separator comprising a porous substrate, a first coating layer and a second coating layer, the first coating layer and the second coating layer are on a surface of the porous substrate, the first coating layer is disposed on at least one side of the second coating layer, the first coating layer includes a first binder, and the second coating layer includes a second binder, the adhesive force between the first coating layer and the positive electrode or the negative electrode is greater than the adhesive force between the second coating layer and the positive electrode or the negative electrode. The electrochemical device provided by the present application can further improve the cycle performance of the electrochemical device.

公开(公告)号：US11682765B2

公开(公告)日：2023-06-20

申请号：US16534191

申请日：2019-08-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Huixin Wang ,  Silin Huang ,  Sheng Cheng ,  Hongming Yu

IPC: H01M4/587 ,  H01M4/525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M4/02

CPC classification number: H01M4/587 ,  H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M4/525 ,  H01M4/625 ,  H01M2004/021

Abstract: A lithium secondary battery is disclosed which includes a cathode having a first cathode region and a second cathode region adjacent to the first cathode region, wherein the second cathode region is adjacent to an uncoated region of the cathode substrate; an anode, the anode having a first anode region and a second anode region adjacent to the first anode region, wherein the second anode region is adjacent to an uncoated region of the anode substrate, wherein a value C1 is a ratio of a direct current resistance value RA1 of the first anode region to a direct current resistance value RC1 of the first cathode region; wherein a value C2 is a ratio of a direct current resistance value RA2 of the second anode region to a direct current resistance value RC2 of the second cathode region; and wherein C2

公开(公告)号：US11658366B2

公开(公告)日：2023-05-23

申请号：US16672550

申请日：2019-11-04

Applicant: Ningde Amperex Technology Limited

Inventor： Silin Huang ,  Huixin Wang ,  Sheng Cheng ,  Hongming Yu

IPC: H01M50/46 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02 ,  H01M50/457 ,  H01M50/449

CPC classification number: H01M50/461 ,  H01M4/623 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/457 ,  H01M2004/027 ,  H01M2004/028

Abstract: The present application provides an electrochemical device. The electrochemical device, comprising: a positive electrode; a negative electrode; and the separator, disposed between the positive electrode and the negative electrode, wherein the separator comprising a porous substrate, a first coating layer and a second coating layer, the first coating layer and the second coating layer are on a surface of the porous substrate, the first coating layer is disposed on at least one side of the second coating layer, the first coating layer includes a first binder, and the second coating layer includes a second binder, the adhesive force between the first coating layer and the positive electrode or the negative electrode is greater than the adhesive force between the second coating layer and the positive electrode or the negative electrode. The electrochemical device provided by the present application can further improve the cycle performance of the electrochemical device.

公开(公告)号：US20220200050A1

公开(公告)日：2022-06-23

申请号：US17560628

申请日：2021-12-23

Applicant: Ningde Amperex Technology Limited

Inventor： Chenxi Jiang ,  Yafei Zhang ,  Hongming Yu ,  Xinghua Tao

IPC: H01M10/0567 ,  H01M10/0525

Abstract: An electrochemical apparatus includes a positive electrode sheet including a positive electrode active material layer; a negative electrode sheet including a negative electrode active material layer; and a separator disposed between the positive electrode sheet and the negative electrode sheet. A mass ratio of fluorine to nitrogen on a surface layer of the positive electrode active material layer is A, a mass ratio of fluorine to nitrogen on a surface layer of the negative electrode active material layer is B, 3≤A≤50, and 30≤B≤300.

公开(公告)号：US20200313171A1

公开(公告)日：2020-10-01

申请号：US16534494

申请日：2019-08-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Huixin Wang ,  Silin Huang ,  Hongming Yu ,  Sheng Cheng

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/1393 ,  H01M10/052

Abstract: The present application relates to an electrode and an electrochemical device including the electrode. The anode of the present application includes a first anode region and a second anode region, wherein the unit area capacity CsA2 of the second anode region is greater than or equal to the unit area capacity CsA1 of the first anode region. The cathode of the present application includes a first cathode region and a second cathode region, wherein the unit area capacity CsC2 of the second cathode region is less than or equal to 98% of the unit area capacity CsC1 of the first cathode region. When the anode and/or cathode of the present application are/is applied to an electrochemical device, the formation of lithium dendrites can be effectively reduced, thereby improving the safety of the electrochemical device.

公开(公告)号：US20230335809A1

公开(公告)日：2023-10-19

申请号：US18211963

申请日：2023-06-20

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shan Zhu ,  Ting Guan ,  Fei Wu ,  Hongming Yu

IPC: H01M10/44 ,  H02J7/00

CPC classification number: H01M10/44 ,  H02J7/0048 ,  H02J7/00714 ,  H02J7/007182

Abstract: A battery charging method is provided, including: constant-current charging the battery with a first charge current I1 to a first voltage U1 and constant-voltage charging the battery with the first voltage U1 to a first charge cut-off current I1′ (S1); constant-current charging the battery with the first charge current I1 to a second voltage U2, where U2 is a limited charge voltage of the battery, and U2>U1 (S2); and constant-current charging the battery with a second charge current I2 to a third voltage U3 and constant-voltage charging the battery with the third voltage U3 to a second charge cut-off current I2′, where U3>U2, I2

公开(公告)号：US11728474B2

公开(公告)日：2023-08-15

申请号：US16534494

申请日：2019-08-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Huixin Wang ,  Silin Huang ,  Hongming Yu ,  Sheng Cheng

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/1393 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/1393 ,  H01M10/052

Abstract: A battery cell is disclosed having a cathode including a cathode substrate with a surface coating of a first cathode active material in a first cathode region and a second cathode active material in a second cathode region, an anode including an anode substrate having a surface coating of a first anode active material in a first anode region and a second anode active material in a second anode region, wherein a value CB1 is a ratio of a unit area capacity CsA1 of the first anode region to a unit area capacity Csc1 of the first cathode region, a value CB2 is a ratio of a unit area capacity CsA2 of the second anode region to a unit area capacity Csc2 of the second cathode region, wherein the surface coating of the cathode and/or anode is a partitioned coating including different active materials, and wherein CB2≥CB1.